80% Arms GST-9 MOD1 just got the biggest upgrade ever. They are now including industry-leading CNC precision cut rails made from hardened steel at no additional cost. It'll change the way you shoot.

Every jig 80% Arms produces has led the market. This isn’t hyperbole, this isn’t fluff, it’s just the truth. From the invention of the original AR-15 router jig to the re-imagination of 80% pistol jigs, they pride themselves on having the easiest, most accurate, and most durable jigs available for home-building enthusiasts.

The MOD1 Jig is no exception. Taking the already rock-solid jig for the original GST-9, they’ve improved on the finishing process even further. Extended drill guides offer more support for the drill bits allowing more precise completion, helping eliminate the most common mistake when building 80% pistols: drilling oblong or off-center holes.

They’ve also added an additional bolt point, making sure that the jig has 100% coverage in its clamping system. This ensures that every cut you make is in the right place, every time. The MOD1 Jig is also made of glass-filled reinforced polymer, a compound 3x stronger and more rigid than competing 80% pistol jigs on the market.

**Frame rails are ONLY included with the jig, not with the 80% lower itself.
***The picture shows an 80% Lower for reference only. It is NOT included.


DISCLAIMER: This product is not manufactured, authorized, endorsed, or warranted by GLOCK. GLOCK does not warrant or represent that this product is compatible with GLOCK pistols.