BSA Pre war, Cadet & Cadet Major parts


Telephone  01243 824284

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© Copyright Protek Supplies

~~~ Most parts in stock for dispatch usually same day ~~~

~~~ Flat rate postage charge of £3.90 (air guns  £12.00 to send) ~~~

Air guns can not be ordered by Paypal. Phone us to place order using credit/debit card. Barrels, pistons and air guns later than 1939 can only be sent to a registered fire arms dealer. Postage rates shown for UK if outside of UK contact us first. 01243 824284

Place your order


B73 - Detent latch and spring Used bot very good condition BSA cadet major £8.00

B75 - Spring guide for Major second hand, good condition £9.00

B76 - Rearsight blade for Major  (modern repro) for Cadet Major and Airsporter Mark 1. Metal construction. £19.50

B91 - Breech seal £5 00 OUT OF STOCK

B99 - Front stock screw (cheese head top BSA part 16-717) NOT SUPPLIED WITH WASHERS. Original, used in very good condition. £9.00

B128- Cadet mainspring £15.00

B129 - Cadet Major mainspring £15.50

B153 - Cocking lever catch button with spring £18.50

B97 - Cocking lever axis pin for BSA A, C, T, late S + L models £8.00

B10 - Mainspring to fit the S, T, and CS models £12.50

B136 - Cocking link axis bolt for S, T, C, CS, A underlevers £19.50 SOLD

B170 - Trigger axis screw for Standard and Light models £9.50 OUT OF STOCK

B176F - Front sight for pre war underlever & breakdown ptn, blacked  finish non shiny to match good used rifles £15.00 OUT OF STOCK

B177F - Cast steel, polished and blued. Nicely finished. £47.00 OUT OF STOCK

B177U - Unfinished

As cast £32.00 OUT OF STOCK

TRIGGER GUARDS for BSA S and L underlevers, prewar. Will fit imp model D but no trigger adjustment.

B177P - Spruce removed and polished out ready for final polishing and bluing £39.00 OUT OF STOCK


B90 - trigger axis screw reproduction part. Please note this is the 5.5mm version, they changed to a smaller diameter at some stage, please check what size you need before ordering. £12.00

B123 - Piston washer, leather buffer and dished washer and screw £19.00

We have some 2nd hand parts available for pre 1939s, phone us with your requirements.

Click here to view “1948 to Current day” BSA parts.

B188 - Breech seal for BSA BREAKDOWN rifle. Leather 5/8” OD, 6mm ID, 2.4mm thick. £3.00

B176P - Front sight for pre war underlever & breakdown ptn, Polished and blacked to match refinished rifles £19.00 OUT OF STOCK

B176U - Front sight for pre war underlever & breakdown ptn, unfinished (if you want to do the finishing yourself) £12.50 OUT OF STOCK

B198 - Front stock screw for EARLY Cadet or Cadet Major BSA part 16-717A. Original, used, very good condition. £8.40

Phone up & order it

01243 824284

Quick & easy

B211 - Sight screws, width at thread is 6mm about quarter inch £14.50 each OUT OF STOCK

Reproduction parts to fit turret type sight as on BSA Standard & late improved model D rifles. Available as finished or unfinished. 19mm wide.






B236 - Tap retaining plate screw £4.00 each (STD33)

B236 - Tap retaining plate screw £4.00 each

We have air gun stocks…click here

B239 - Piston head assembly, leather and rubber washer plus steel washer, complete assembly £19.00

B243 - Sight elevation screw £19.00

B244 - Barrel axis pin USED £4.00

8.92mm wide at base, 14.75mm high

B176B - Front sight for pre war underlever & breakdown ptn, Brown finish for older  looking rifles £17.00 OUT OF STOCK


Specially manufactured trigger guard screws to fit all pre war BSAs BUT NOT juvenile. To fit Juvenile you have to shorten thread. We offer 3 different finishes:

B271 - White £9.00 pair

B272 - Blued finish £9.50 pair

B273 - Brown finish £10.00 pair

B304 - Sear axis bolt, used good condition £8.00


B305 - Trigger axis screw used good condition £8.00 SOLD

Underlever catches for BSA L, S, T, C, A, AND CS MODELS and Diana 42, 45, 48, 58.

B310 - BSA STANDARD cocking lever axis bolt £19.50

B320 - Barrel axis (hinge) pin, BSA part number 16-422 BRAND NEW £5.80

We are in the process of having

some more made.



To fit L, S, T, C and CS models of Standard underlever. Made of plastic they can be easily fine filed or emery papered to fit, can be painted for colour match to wood stock.

Measure your existing hole stock and choose next size up and emery or file it to fit.










All are £12.00 each


39.2 x 23.3mm OUT OF STOCK

38.1 x 23.1mm

37.3 x 22.8mm

37.8 x 22.9mm

37.8 x 22.7mm

37.9 x 23.4mm OUT OF STOCK

38.1 x 22.9mm

B404 - Stock bolt, fits all pre world awr 2 BSA under lever rifles. 128mm £18.00 OUT OF STOCK

B406 - Lincoln Jeffries breach plug screw, early. £18.00 OUT OF STOCK

B433 - Loading tap .22 calibre for Standard, used good condition, with plunger and spring £45.00


B219 - BSA Standard ‘U’ profile rear sight blade. 19.2mm wide. We had these specially made in our home town of Bognor Regis to a very high standard. We have also reduced these in price from £17.20 they are now only £15.00

‘U’ profile, viewed from above.


B313 - ‘H’ profile rear sight blade, 19.2mm wide for prefixes S, L and CS. Specially made for us in Bognor Regis, very high quality £16.00

‘H’ profile, viewed from above.


B448 - BSA STANDARD underlever axis screw keeper screw (STD38) £12.00 OUT OF STOCK

B448 - BSA STANDARD underlever axis screw keeper screw (STD38) £9.00

B486 - Keeper screw for the link axis screw. (BSA part STD31SK) £4.50

B451 - BSA Cadet Major sear adjust pawl £7.20

B485 - BSA STANDARD cocking link axis screw. Used. £9.50 OUT OF STOCK

B484 - Loading tap, .22 calibre, for S and T model underlevers, used, very good condition. £40.00

B481 - Cocking lever axis pin for T and A and C underlevers, used good condition. £4.00

B480 - Cocking link for  T and S underlevers, used good condition. £30.00 OUT OF STOCK

B122B -  piston washer/piston seal  to BSA Standard model A, C, ,& CS and T and , also BSA Airsporter mark 1 and 2 £10.00

B489 - Trigger guard for Cadet and Major, (BSA part number 16-417) £9.00 SOLD

B492 - Trigger adjusting screw, used good condition. £4.00 SOLD

B494 - Trigger adjusting locking screw, used good condition £3.00 SOLD

B504 - BSA STANDARD tap plate screws, used, some slight damage £5.00 for the pair


B493 - Trigger, used, good condition. £25.00

B495 - Sear, used good condition £15.00 SOLD

B499 - Front sight for STANDARD UNDERLEVER used genuine BSA part very good condition also fits Cadet Major. £25.00


B122A-  piston washer/piston seal  to BSA Standard model  L, & CS and S £10.50

B518 - BSA/LINCOLN JEFFRIES breech tap and non-original but usable retaining screw, .177 used, good condition. £45.00 SOLD

B523 - Imp mod D trigger guard, with adjust screw, used, fair condition, late version. £55.00 SOLD

B524 - Imp mod D lever axis bolt, used. £8.00 SOLD

B525 - Imp mod D cocking lever axis screw locking screw, used £3.00 SOLD

B526 - Imp mod D loading tap .177, used VGC £40.00 SOLD

B527 - Imp mod D sidelever catch retaining catch, used £15.00 SOLD

B528 - Imp mod D tap plate, used very good condition. £20.00 SOLD

B529 - Imp mod D sidelever catch cocking lever 237mm long for light 39” model used, good condition. £55.00 SOLD

B530 - Imp mod D mainspring, for light model, flat section coils, original, used, very good condition, 174mm long, 30 turns. £18.00 SOLD


In its 280 pages and 30 chapters this full colour hardback A4 sized book allows owners and collectors to identify individual models and variations within model ranges. Also included are details on accessories and sighting aids available to BSA users at the time.This book contains many previously unpublished contemporary photographs and colour pictures of rifle details. Also has in depth look at actual shooting of BSA airguns at the time.

The Book Of The BSA Air Rifle 1905-1939

by John Milewski

A guide to shooting and collecting the iconic BSA air rifle

Pick up a copy in our shop you can order by phone on 01243 824284. You can also order via Paypal using the buy links.

One copy to UK

£49.95 + £4.95 post

One copy to Europe

£49.95 + £19.95 post

One copy to rest of world

£49.95 + £34.95 post

To order a copy and pay by Paypal

use the links below

You can phone your order through and pay by credit or debit card, 01243 824284 or pick a copy up from our shop.



11am till 4pm

If in doubt, the B402/2 is the most commonly sold size

B568 - GREENER peepsight, Vintage, good condition fully working. Windage and elevation adjustable. With 3 hole adjustable aperture £75.00 No fixing screws supplied.

Two angles of the same device shown, we only have one!

B122A - Leather piston washer. £10.50

B559 - BSA L/A MODEL UNDERLEVER. Used, some pitting overall. Button catch may not work. 242mm overall length. £20.00

B565 - Cocking lever for EARLY BSA/LINCOLN JEFFRIES, good condition, brown finish, marked “Lincoln Jeffries Patent” on the underside, 300mm total length. £58.00 SOLD

W324 - Underlever catch, unfinished, and is slightly oversized base for wider grooves c11.5mm base at its widest. File to fit. £24.00

This underlever catch looks much better in real life than this photo.They are very nicely made and finished

B574 - BSA/LINCOLN JEFFRIES underlever catch, narrow type, unfinished, needs final fitting and blacking. Brand new and made in England for us. Made of steel. £24.00

B498 - CADET/MAJOR rear trigger gard wood screw used very good condition. £3.00

B577 - Rearsight blade for Cadet major and Airsporter Mark 1. Precision made from plastic, 15mm wide. £6.50

Multi angle photo, one supplied!

B579 - Rearsight assembly fits Cadet Major, used base, reproduction sight wheel, metal blade, with spring. Also fits BSA Airsporter mark 1 and can be fitted to older underlever rifles but is narrower  than original ones. £59.00 SOLD

B578 - As above but uses a plastic blade instead of metal blade, no spring. £44.00

BSA Cadet Major piston, fitted with synthetic piston head £40.00 CAN COLLECT FROM OUR SHOP OR WE CAN SEND TO AN RFD FOR YOU TO COLLECT

B282 - For early Lincoln Jeffries/BSA pattern rear  sight 15.85mm .625inch wide, hand finished and tried in 2 different bases for proper fit. £18.00

B584 - First pattern Lincoln Jeffries/BSA rear sight, new production. £55.00

B583 - First pattern Lincoln Jeffries/BSA sight adjusting wheel. New production. £18.00

B594 - Adapter and seal to fit BSA Cadet and Cadet Major piston (as shown fitted  to the piston to the left) £19.10

B582 - 3D printed plastic front sights. Very nicely made. £8.00 3 angles shown, 1 supplied.


We would be interested in hearing from anyone who can make these for us in metal cast or CNC machined or otherwise.

SOLD 11/23

B605- CADET barrel and sights, fair condition, .177 rifled. £28.00 CAN COLLECT FROM US OR WE CAN SEND TO REGISTERED FIREARMS DEALER FOR YOU TO COLLECT.

B604 - Stock plus fixing screw for BSA Improved model B or D. Very nice condition.With metal butt plate, varnish finish, the BSA pylarm logo being clearly visible. Being sold on a commission sale basis for a friend of ours. £95.00

SOLD 01/24

B606 - 3D plastic printed trigger guard to fit pre WW1 BSA Improved type underlever with trigger adjustment bolt.may need minor final fitting at back (craft knife and emery cloth) Obviously no where near as good as metal component but far better than nothing being fitted. £25.00

NOTE: Picture shows 3 angles of same thing.

B607 - Cadet Major front sight, very good condition used. £24.00 SOLD

B486 - Improved model D, KEEPER SCREW for the cocking link axis screw.BSA PART NUMBER STD31SK  £4.50

SOLD 02/24

B612 - BSA underlever cocking link axis screw with cut out for keeper screw. BSA PART NUMBER IS STD31 £16.00

B613 - BSA Standard under lever and push catch, good condition, light patina overall. £50.00

B614 - Improved model D side catch cocking latch, 30cm long, complete, grainy brown finish. £55.00

B615 - Improved model D cocking link, 170mm long for standard length model 43 inches. Used in very good condition, brown finish. £45.00

B617 - BSA Standard and light underlever cocking link axis screw, plain head no cut out for keeper screw. £15.00


B625 - Pair of contra wound springs for Standard underlever rifle, 117mm longneach one. Used in good condition. £28.00 the pair.