Pay in 4 interest-free payments of $47.50 Learn more
Ships within 48 hours · Estimated delivery Sep 16 - Sep 21
Being one of the most recent release in the market
M4 magazine NOT included
FN Herstal
Y&P or STTI MK23 magazines
Compatible with TM Version 2 M4 / M16 Gearbox
Retro Arms CZ Billet CNC 8mm Ver.2 Gearbox Shell for M4 / M16 Series AEGs AK74U Being one of the mostUnlike most other gearbox shells on the market, the Retro Arms CZ gearbox shells are precision CNC machined out of a solid block of billet EN AW 7075 T651 aluminum giving them unmatched durability and resilience. Combined with reinforcement of key stress points and stainless steel connecting bolts, the gearbox shell has undergone extensive stress tests with M160 springs without any signs of wear. Precision machined from a block of billet EN AW 7075
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