Does the Knights Armament 7.62MM SR-25A2 20" KIT work with the JP Enterprises Bolt Carrier Large Frame?

Upper Receiver
Knights Armament 7.62MM SR-25A2 20" KIT
from $3283.20

Bolt Carrier Group
JP Enterprises Bolt Carrier Large Frame Variable Mass
from $584.25
upper and JP Enterprises bolt carrier group compatibility
Yes, they fit
The Knights Armament 7.62MM SR-25A2 20" KIT works with the JP Enterprises Bolt Carrier Large Frame Variable. Our compatibility rules found no conflict between them.
This exact setup is in a real GunPartPicker build.
Counted from real GunPartPicker builds: parts lists people put together while planning to buy.
Checked by the same rules the AR builder runs on every part you add: caliber, frame size, receiver pattern, thread pitch and gas length.
Fit is judged from the specs retailers list, which can be missing or wrong. Confirm with the manufacturer before you buy, and have a qualified gunsmith check any build before you fire it.
How often builders pair the upper and JP Enterprises bolt carrier group
Backed by thousands of qualified builds that have both an upper and a bolt carrier group.
Share of builds with the Knights Armament 7.62MM SR-25A2 20" KIT and any bolt carrier group
- Bravo CompanyDoes not fit25%
- ODIN Works Enhanced 9mm NitrideDoes not fit25%
- This pairJP Enterprises Bolt Carrier Large Frame Variable13%
Share of builds with the JP Enterprises Bolt Carrier Large Frame and any upper
- FightLite MCR Dual-Feed 16.25" Upper 5.56x45mmDoes not fit27%
- This pairKnights Armament 7.62MM SR-25A2 20" KIT4%
- Daniel Defense 11.5" 5.56 NATO 1:7 Carbine UpperDoes not fit4%
Knights Armament 7.62MM SR-25A2 20" KIT
- Of upper picks
- 0.1%
- Median paid
- $3283
JP Enterprises Bolt Carrier Large Frame
- Of bolt carrier group picks
- 0.3%
- Median paid
- $584
How we count ⌄
These shares come from GunPartPicker's build data: real parts lists people put together while planning a purchase, not sales or surveys. A build counts a part only when it is the final pick for its slot, so parts that were swapped out never count. Fit never comes from these numbers; it comes from our compatibility rules alone.
Frequently built with the upper and JP Enterprises bolt carrier group
The part builders pick most often in each slot alongside these two, checked against both. Parts that conflict are left out.
Charging Handle

Radian Raptor & Talon Safety Selector Combo
Unconfirmed
Stock & Brace
Suppressor
Rifle Scope
Knights Armament 7.62MM vs JP Enterprises Bolt Carrier: specs and prices
| Knights Armament 7.62MM | JP Enterprises Bolt Carrier | |
|---|---|---|
| Best price | $3283.20 at AR15 Discounts | $584.25 at Optics Planet |
| Stores | 0 of 1 in stock | 1 of 1 in stock |
| Assembly | Complete | n/a |
| Platform | AR-10 | n/a |
| Caliber | 7.62x51 NATO | n/a |
| Receiver Type | A4 | n/a |
| Length | 20 | n/a |
| Cartridge | n/a | .308 Win |
| Finish | n/a | Black |
Both for $3867.45 at today's best prices.
Today's best prices and 90 day price history
Every store we track for each part, cheapest in stock first. Prices are checked through the day.
Price history, last 90 days
- Knights Armament 7.62MM SR-25A2 20" KIT: lowest $3283.20 on Jul 5, highest $3283.20 on Jul 5 over the last 90 days.
- JP Enterprises Bolt Carrier Large Frame: lowest $584.25 on Jul 5, highest $584.25 on Jul 5 over the last 90 days.
Bolt Carrier Groups frequently paired with the Knights Armament 7.62MM SR-25A2 20" KIT
Most picked next to it in real builds. Only parts our rules say fit the Knights Armament 7.62MM SR-25A2 20" KIT are listed.
Upper Receivers frequently paired with the JP Enterprises Bolt Carrier Large Frame
Most picked next to it in real builds. Only parts our rules say fit the JP Enterprises Bolt Carrier Large Frame are listed.
















