So, here are the items 4Shooters Recommends for your Vepr-12:
Muzzle Brakes:
GK-03++ Vepr12/Saiga12 Ilyin Muzzle Brake RH IPSC Lab
Chokes:
https://4shooters.com/rifle-and-shotgun-accessories/chokes?thread=1777&per_page=24&page=1
Pistol grips:
https://4shooters.com/product/custom-arms-akveprsaiga-pistol-grip.html
https://4shooters.com/product/fab-defense-aksaigavepr-pistol-grip-sg-1.html
https://4shooters.com/product/hogue-aksaigavepr-pistol-grip.html
https://4shooters.com/product/red-force-vepr-12-left-hand-safety-lever-cap.html
Mag Releases:
Thumb:
https://4shooters.com/product/lac-vepr-12-mag-release-faster-5.html
https://4shooters.com/product/vepr-12-mag-release-arhipovs-lever-skeleton-20190125071720.html
https://4shooters.com/product/vepr-12saiga-12-mag-release-arhipovs-lever.html
https://4shooters.com/product/vepr-12saiga-12-mag-release-arhipovs-lever-short.html
Index:
https://4shooters.com/product/vepr-12saiga-12-enhanced-mag-release.html
https://4shooters.com/product/red-force-mag-release.html
https://4shooters.com/product/extended-magazine-release-saiga-12--vepr-12.html
https://4shooters.com/product/extended-magazine-release-saiga-12--vepr-12-20161101003843.html
Forearms:
https://4shooters.com/products/search/q/tubular+vepr-12
https://4shooters.com/product/magpul-zhukov-vepr-12-handguard.html
https://4shooters.com/product/vepr-12-oem-handguard-with-picatinny-rails.html
https://4shooters.com/product/css-vepr12-quad-rail.html
Charging Handles:
https://4shooters.com/product/vepr-charging-handle-by-hartman.html
Useful additions:
https://4shooters.com/product/vepr-12-multi-tool.html
https://4shooters.com/product/vepr-12-quick-takedown-pin.html
https://4shooters.com/product/vepr-12-recoil-stock-absorber-20170710121939.html
https://4shooters.com/product/lac-vepr-12-enhanced-bolt-hold-open-release.html
Red Dot mounts:
https://4shooters.com/product/vepr-12-rear-sight-picatinny-rail-adapter.html
https://4shooters.com/product/css-rifle-scout-sight-rail-mount-for-all-rifles.html
https://4shooters.com/product/alfa-arms-vepr-12-weaver-rail-gas-tube.html
Red dots:
https://4shooters.com/manufacturer/holosun-technologies
I highly recommend Holosun and we can do a really good prices on it
You can use coupon HoHoHolosun for 20% Off
Triggers:
https://4shooters.com/product/alg-defense-enhanced-saiga-12vepr-12-trigger-gen-2tromix-edition.html
https://4shooters.com/product/alg-defense-saiga-12vepr-12-trigger-tromix-edition-gen2.html
https://4shooters.com/product/jte-performance-power-hammer-spring-main-spring-for-all-saiga-and-ak-variants.html
Stock Adapters for the Slant Back Vepr Receivers:
https://4shooters.com/product/vepr-slant-to-m4-stock-adapter-by-krebs-custom.html
https://4shooters.com/product/dissident-arms-vepr-m4-stock-adapter-slant-receiver.html
https://4shooters.com/product/armacon-vepr-to-m4-stock-adapter-20180425120049.html
Buffer tubes and nuts:
https://4shooters.com/products/search/q/buffer+tube
Most popular stocks:
Lightweight ones:
https://4shooters.com/product/armacon-stock-baskak.html
https://4shooters.com/product/bad-sabertube-end-plate-stock-combo.html
https://4shooters.com/product/dbst-arfx-ace-ar15-skltn-stkbuf-blk.html
https://4shooters.com/product/dbst-arfxe-ace-ar15-skltonbuff-stk.html
Regular Ones:
https://4shooters.com/product/fab-def-gl-shock-ar15-stk-wriser.html
https://4shooters.com/products/search/q/magpul+ctr
https://4shooters.com/products/search?manufacturer=109&per_page=24&q=minimalist
(If you using a red dot, the cheek riser is usually highly recommended)
If you have any issues with the gun cycling, here are 4 steps:
1) Performance Spring and a guide rod:
https://4shooters.com/product/performance-recoil-spring-for-all-saigavepr-shotguns.html
https://4shooters.com/products/search/q/vepr+guide+rod
2) Polishing all the points of contact
3) Gas Puck
https://4shooters.com/product/vepr-12-gas-piston-malutka.html
https://4shooters.com/product/vepr-12-gas-piston-korotish.html
4) Gas Block:
https://4shooters.com/product/vepr-12-sports-gas-block.html
https://4shooters.com/product/vepr12-weaver-rail-gas-block-20170710121939.html
Also we carry a lot of different Magazines, Mag Pouches, Retainers, Slings, front grips, flip up sights, Flashlights, Laser Sights, etc