AR-15 Foregrip - Larger scale for bigger rails
thingiverse
To accommodate my AR-15's YHM Lightweight Specter Quad Rail (9.675 inches, free float), I scaled the rail gap by approximately 1.1022x. Initially, the gap measured around 18-19mm and my rail was 21-22mm wide. This scaling ensured a perfect fit. After almost a year of usage with over 2k rounds fired, the rail remains solid, showing no signs of damage or cracking despite being carried by just the foregrip and used as a bench rest. I recommend an infill rate of at least 30%, up to 70% for optimal strength. Print temperature should be set at 230°C, with a bed temperature of 120°C. A full support raft is also advised.
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