BSA Pre war, Cadet & Cadet Major parts


Telephone  01243 827500

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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 827500

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) £19.50 OUT OF STOCK

B91 - Breech seal £5 00 OUT OF STOCK

B99 - Front stock screw (cheese head top BSA part 16-717) NOT SUPPLIED WITH WASHERS £8.50 OUT OF STOCK

B128- Cadet mainspring £15.00

B129 - Cadet Major mainspring £15.50

B153 - Cocking lever catch button with spring £18.50

B93 - Cocking Lever for BSA S or T model. Used but in very good condition smooth no pitting but worn to grey silvery colour could easy be refinished. £48 00

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

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 £9.00 OUT OF STOCK

Phone up & order it

01243 827500

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 £19.00

B243 - Sight elevation screw £15.00 SOLD

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

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

B283 - Rear sight elevating screw - BSA Lincoln Jeffries pattern, correct thread form £14.00

B285 - Lincoln Jeffries pattern trigger adjusting screw with nut £15.00

B304 - Sear axis bolt, used good condition £8.00


B305 - Trigger axis screw used good condition £8.00

Underlever catches for BSA L, S, T, C, A, AND CS MODELS and Diana 42, 45, 48, 58. Available in finished or unfinished which may require some filing on underneath. Order as

B306F -  (finished) £18.00 OUT OF STOCK

B306U - (unfinished) OUT OF STOCK £14.00

BSA part number is 1919-39

(Also on Diana page)

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

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

M109 - Early BSA underlever 1st spade handle without strengthening filletts, brown worn finish, no markings, possibly Lincoln Jeffries £45

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) £11.50


B449 - Keeper screw for the link axis screw. (BSA part STD31) £9.00 OUT OF STOCK

B451 - BSA Cadet Major sear adjust pawl £7.20

B486 - Piston for BSA S and CS and T models, used good condition, piston head not good. c1929-39 £45.00

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

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 £9.00

Sold 0121

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

B490 - S model Standard, butt and trigger block/spring guide, very nice condition, it has the wood hole cover/plug on the back. £70.00

B491 - Cocking lever for BSA CS/S/T, with button catch. In good condition £40.00

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

B493 - Trigger, used, good condition. £25.00

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

B495 - Sear, used good condition £15.00 SOLD

B500 - Sigfht unit for CADET MAJOR  and AIRSPORTER MK1, VGC complete. £55.00 SOLD

B501 - Stock bolt for BSA CADET MAJOR with spring washer, used good condition, BSA part number 16-714, used good condition £10.00

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

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

SOLD 110321 SOLD 190321

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

B505 - BSA CADET MAJOR ACTION ONLY, does cock and shoot, fair condition, some pitting below stock line, no photo etching visible. £28.00 CAN SEND TO RFD ONLY OR COLLECT FROM OUR SHOP.

SOLD SOLD 140421 SOLD 110521 SOLD190521 SOLD 280521 SOLD  080621 SOLD

B122A-  piston washer/piston seal  to BSA Standard model  L, & CS and S £11.00

B515 - BSA/LINCOLN JEFFRIES trigger guard and adjusting screw. Fair used condition, lug at back broken off but still usable. £40.00

B517 - BSA/LINCOLN JEFFRIES cocking link (43 inch model) 174mm long , used good condition, brown finish. £40.00 SOLD

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

B520 - Underlever Lincoln Jeffries early version no markings fair condition brown finish 11 and a half inch long £48.00

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

B531 - Imp mod D light model (39”) cocking link, used. £25.00

B533 - BSA IMPROVED D piston. For light model (39”) for double sear trigger mechanism, used good condition, piston head may be serviceable. £40.00


B536 - BSA IMP MODEL D stock and trigger block, with double sear trigger fitted. Not tested but appears complete. Stock is well used lots of surface scratches, slight hairline crack on one side of pistol grip, bolt hole plate cover is present but broken and has proved impossible to remove without further damage. Has small retailers mark (ours) stamped in to side where pilearm mark would have been on earlier versions. Would refinish OK checkering quite good. £60.00

SOLD 1221 SOLD 0122

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 827500. 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 827500 or pick a copy up from our shop.



11am till 4pm

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

SOLD 0322

B546 - GREENER peepsight, Vintage, good condition fully working. Windage and elevation adjustable. £65.00 No fixing screws supplied.

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


B122A - Leather piston washer. £9.00

SOLD 0622