DROP IN FRD
Overview Our drop‑in kit is built from S7 and 4140 hardened steel for strength and long service life. It installs in any standard mil‑spec lower with no permanent modifications.
Quick install
- Pop the upper, set the unit behind the hammer, close it, and run it.
- Swaps between builds easily — one system you can move from rifle to rifle.
Selector options
- Works with a standard 2‑position selector.
- For three positions, pair with a super‑safety cut trigger and an M16‑style 3‑position lever. Advanced users may machine a compatible 3‑position selector at their own discretion.
Required setup (same operating principles as Super Safety systems)
- Full‑auto bolt carrier group (BCG)
- H3 buffer
Fitment note
- Due to normal tolerance differences between uppers/lowers — especially uncommon variants like wide‑pocket M16 lowers or some LBE‑branded receivers — minor fitting may be required.
- In typical builds with a full‑auto BCG and H3 buffer, the kit drops in and runs on roughly 98% of AR‑pattern rifles “out of the box.”
