AR 15 Forward Assist

About this product

This is Combat Armory's complete AR-15 forward assist assembly — the plunger, spring, and retainer pin as a ready-to-install kit rather than a milled or machined upper receiver component. It's one of the smaller, more affordable parts in Combat Armory's catalog, priced at $4.99 and confirmed directly against the company's own listing matching this generic "AR-15 Forward Assist" title.

What does the forward assist actually do on an AR-15?

The forward assist lets a shooter manually push the bolt carrier group fully into battery if it fails to seat completely on its own — typically from a dirty chamber, a slightly out-of-spec round, or fouling buildup during extended firing. Pressing the serrated forward assist button drives the internal plunger against the bolt carrier's cam pin lug, seating the bolt without needing to rack the charging handle.

What's included in this kit?

The assembly includes the plunger, the spring that returns it to its resting position after use, and the retainer pin that holds the whole assembly captive in the upper receiver's forward assist housing. This is the complete internal assembly, not including the external forward assist housing itself, which is typically already machined into a standard AR-15 upper receiver.

Will this fit any AR-15 upper?

It's built for standard mil-spec AR-15 upper receivers that include a forward assist housing — some upper receiver designs omit the forward assist feature entirely, so confirm your specific upper includes that housing before ordering, since this part has nothing to mount to on a forward-assist-less upper.

Does this need to ship through an FFL?

No. A forward assist assembly is a small internal part, not a firearm, so it ships directly to your address with no FFL transfer required.

This is a genuinely simple, low-cost part to keep on hand for anyone building or maintaining an AR-15 upper, since a lost retainer pin or a worn spring are both minor, inexpensive fixes with a kit like this rather than requiring a full new upper receiver purchase. Confirming this listing directly against Combat Armory's own product page gives higher confidence in the spec accuracy here than for some of the company's less clearly documented parts, and at under $5, it's a low-risk addition to a spare-parts kit for anyone who already owns AR-15 tools and expects to do their own basic maintenance and repairs over the life of the rifle.

Some shooters debate how often the forward assist actually gets used in practice, since a properly functioning AR-15 with clean ammunition and a well-maintained chamber rarely needs it — but that's exactly why the part tends to get overlooked until the one range trip where dirt, a slightly out-of-spec round, or a dry chamber causes the bolt to hang up just short of battery. Having a spare assembly on hand means a worn spring or a lost retainer pin doesn't turn into a range-day-ending problem, since the fix is a five-minute swap rather than a trip to a gunsmith or an online parts order placed too late to help that day. For builders assembling a complete upper receiver from separate parts rather than buying a finished one, this is one of the smaller line items on the parts list, but a necessary one to keep on the shelf if your chosen upper includes the forward assist housing and you plan to handle routine maintenance yourself over the rifle's working life.