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Finishing a stripped upper always comes down to the same handful of small parts, and this is the bag that has them. The Smith & Wesson M&P AR-15 Complete Upper Parts Kit pulls together the forward assist assembly, ejection port cover, and every spring, pin, and clip that goes with them. Instead of buying pieces one at a time and hoping they all show up, you get the full set ready to install on a standard mil-spec upper receiver.
The forward assist arrives already assembled, which is the smart way to buy it. Building one from scratch is doable but fiddly, so having it done saves you the headache. Alongside it you get the forward assist spring and roll pin, the ejection port cover (also called a dust door), the ejection port spring and hinge pin, plus the hinge pin clip that keeps the whole cover in place. These are the standard service parts most builders end up needing when they're staring at a bare upper.
Installation is straightforward if you've got the right hand tools. A roll pin punch and a small hammer make seating the forward assist roll pin clean, and a bench block is a big help for keeping everything lined up and captured while you work. The ejection port cover is the part that trips people up most, mainly because of getting the spring tension oriented correctly, so take your time with the hinge pin and clip. A pair of needle nose pliers earns its keep there.
Because these follow standard AR-15 dimensions and mil-spec tolerances, they'll drop into a typical stripped upper without drama. It's a solid, no-nonsense way to round out a build or replace a worn ejection port door or tired forward assist spring on a rifle that's seen some rounds. Made in the USA, and priced to be the easy button for the last few parts standing between you and a finished upper.
You get a pre-assembled forward assist along with its spring and roll pin, the ejection port cover, the ejection port spring and hinge pin, and the hinge pin clip. That's the standard set of small parts needed to finish out a stripped upper. Buying them together beats tracking down each piece separately.
Yes, the parts follow standard AR-15 dimensions and mil-spec tolerances, so they drop into a typical stripped upper without issue. It fits M&P15 uppers as well as most other flat-top AR-15 receivers that are cut for a forward assist. If your upper is a slick-side with no forward assist, you'd simply skip that part.
A roll pin punch and a small hammer handle the forward assist roll pin, and a bench block makes it much easier to keep everything captured while you drive pins. A pair of needle nose pliers helps with the ejection port cover hinge pin and clip. The cover spring is the part most people fuss over, so pay attention to spring orientation and take it slow.
It is. The forward assist comes assembled, which saves you the small headache of building one from the pawl, spring, and detent yourself. You just seat it in the receiver and drive the roll pin to lock it in.
| UPC | 661120001287 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 110116 |
| Model | |
| Product Type | Upper Receiver |
| Shipping Weight | 0.155 |
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