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This isn't your bag-of-parts mil-spec kit. The ARMASPEC Gun Builder's Stainless Lower Parts Kit is put together for people who want to hand-pick their trigger and grip instead of settling for whatever comes stuffed in the box. It leaves out the fire control group and pistol grip on purpose, so you're free to drop in your favorite drop-in trigger and the grip that fits your hand without paying twice for parts you'll toss anyway.
The headliner is the Armaspec SFT 45/90 ambidextrous safety selector. It runs as either a 45 or 90 degree throw, works on both sides for lefties and righties, and the lockup has a crisp positive click with no mushy in-between. You also get stainless steel anti-walk trigger and hammer pins with hex keys included, which is a nice touch for keeping your fire control group locked in place round after round.
Every small part that usually gives builders a headache is upgraded here. Stainless takedown and pivot detents, enhanced takedown and pivot pins, an enhanced magazine release button, plus all the springs, the buffer retainer, bolt catch, and mag catch. The stainless internals resist wear and corrosion better than plain steel, and the black finish keeps everything looking uniform inside your receiver.
These parts are compatible with most standard AR-15 lower receivers chambered in .223/5.56, and since a .300 Blackout runs on the same platform, they carry over to those builds too. It's made in the USA and backed by a lifetime warranty, which tells you Armaspec stands behind the machining. Whether you're finishing a fresh stripped lower or refreshing a rifle that's seen a lot of range time, this kit covers the guts and lets you bring your own trigger and grip to the table.
No, this is a builder's kit rather than a complete LPK. It leaves out the fire control group and pistol grip, so you'll need to supply your own trigger, hammer, disconnect and springs, grip, and trigger guard. That's by design, giving you the freedom to install the trigger and grip you actually want.
It comes with the Armaspec SFT 45/90 ambidextrous safety selector, which can be run in either a 45 or 90 degree throw. It works from both sides of the receiver and has a crisp, positive lockup with no mushy feel. Builders consistently note how smooth it operates once installed.
Yes. Since .300 Blackout is built on a standard AR-15 upper and lower receiver, these parts carry right over. The kit is designed for most standard AR-15 lowers chambered in .223/5.56, and the .300 BLK shares that same lower platform.
Stainless anti-walk trigger and hammer pins resist corrosion and hold their position better than standard press-fit pins that can migrate under recoil. The kit includes the hex keys you need to lock them in place. It's a small upgrade that pays off over a lot of rounds.
| UPC | 810048491377 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | ARM151-BLK |
| Color | Black |
| Product Type | Lower Parts Kit |
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