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Building an AR-15 lower and want to skip the bargain-bin pins and springs? The Armaspec Superlight Gun Builders Kit is a curated bundle of the company's enhanced lower parts, built around stainless steel construction and a lightweight design that lets you finish your lower with components a cut above a standard mil-spec kit. It's made in the U.S.A. and is compatible with most AR-15 lowers, so it slots right into whatever receiver you're working with.
The headliner is the Armaspec SFT 45/90 safety selector, giving you the flexibility to run a 45 or 90 degree throw depending on how you like your controls. You also get stainless steel anti-walk trigger and hammer pins with hex keys included, which is the kind of upgrade builders usually buy separately. Rounding it out are the enhanced Superlight takedown and pivot pins, an enhanced magazine release button, and stainless detents throughout. Feedback from builders leans heavily toward easy installation and clean fitment, with the 45 degree safety and anti-walk pins called out as favorites.
One thing to know up front: this is a builder's kit, not a complete lower parts kit. It intentionally leaves out the pistol grip, grip screw and washer, trigger and hammer, trigger and hammer springs, disconnect and disconnect spring, and the trigger guard and roll pin. That's the whole point here, since it's aimed at folks who already have a favorite drop-in trigger and grip picked out and don't want to pay for parts they'll toss aside.
This Black version pairs a black finish with the stainless internals for a clean look, and Armaspec backs the whole kit with a lifetime warranty. It's a solid foundation for a custom build or a worthwhile refresh if your current lower parts have seen better days.
No, and that's by design. It's a builder's kit that leaves out the trigger group and grip, meaning no pistol grip, grip screw and washer, trigger, hammer, their springs, disconnect and spring, or trigger guard and roll pin. It's meant for builders who plan to install their own preferred trigger and grip.
The Armaspec SFT 45/90 lets you set the safety to either a 45 or 90 degree throw, so you can tune the feel to your shooting style or hand position. Shorter throws are popular on faster-handling builds, while the 90 degree option keeps the traditional mil-spec feel. It's one of the standout components in the kit.
It's built to be compatible with most standard AR-15 lowers chambered in .223/5.56. Builders have reported clean installation and good fitment across a range of receivers. As with any parts kit, it's worth confirming your lower follows standard AR-15 dimensions before assembly.
The stainless steel anti-walk trigger and hammer pins lock in place with the included hex keys, which helps keep them from migrating out under recoil. Many builders consider them a must-have upgrade over standard push pins. Having them bundled in this kit saves you from buying them separately.
| UPC | 810048491384 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | ARM251-BLK |
| Length | 8.8000 |
| Model | |
| Color | Black |
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