Strike Industries AR Enhanced Lower Receiver Parts Kit - No FCG

Manufactured by Strike Industries
Manufactured by Strike Industries
17 Reviews
$47.95 $52.95

In Stock

NOTE: Limit 2 per household. Quantities exceeding 2 will not allow checkout.

We are fully staffed and processing orders. Standard orders are shipping in approximately 1 business days or less. FFL orders take approximately 10 business days or less if you can provide us an actively receiving FFL location. Due to high demand, there is a limit of 5 FFL items in a 30 day period.



The SI Enhanced Lower Parts Kit offers a convenient upgrade package whether you are assembling a new lower receiver or breathing new life into an existing build. This kit features Strike Industries Enhanced parts, including the bolt catch, magazine catch and button, pivot and takedown pins, and Strike's 60/90 degree ambi safety selector.

NOTE: This kit does not include a grip, trigger guard, or trigger components.

Kit includes:
  • Strike Industries Enhanced Bolt Catch
  • Bolt catch spring
  • Bolt catch plunger
  • Bolt catch roll pin
  • Strike Industries Enhanced Magazine Catch
  • Strike Industries Enhanced Magazine Release Button
  • Magazine catch spring
  • Strike Industries Enhanced Pivot Pin
  • Strike Industries Enhanced Takedown Pin
  • (2) takedown / pivot detent springs
  • (2) takedown / pivot pin detents
  • Strike Industries 60/90-Degree Ambi Safety Selector
  • Safety detent
  • Safety detent spring
  • Buffer retaining pin
  • Buffer retaining pin spring
  • (2) .154" trigger / hammer pins
  • Trigger spring
  • Hammer spring
  • Disconnector spring

Strike Industries products are designed by shooting experts for the shooting sportsman.
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BrandStrike Industries
Weight3.8 Oz

WARNING: This Product can expose you to chemicals which is known to state of California to cause Cancer and Reproductive Harm. For more information, see

Little inconvenience

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Overall its okay other than missing buffer retent spring. Gonna order couple from PA. Other pack of LPK I bought was missing the buffer retent springs also.

Best Parts Kit You Can Get


I use this kit on all of my builds. You can't beat the price. The safety selector is top notch. All the parts are Strike Industries enhanced version. Plus, you're not wasting a mil-spec trigger. You can drop in whatever you want.

Great LPK

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This LPK is a great addition to any build. Used this LPK in my Mk12 build. All pieces were quality and the enhanced pieces are a nice little upgrade over the Mil-Spec standards. All the pieces fit nice and tight and came together without issues. I’m a massive fan of Strike Industries and this was just another piece of quality kit. Primary Arms is also the gold standard of rifle shopping and supplies

Great kit for the money! Make sure the pivot pin springs are there!

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Absolutely love the price! I mean you can’t buy the ambidextrous selector switch for this price is most cases! Everything fit great, the enhanced controls feel great! What I didn’t love is both of my packs was missing the rear pivot detent spring! Nothing like getting to the last part of your build on 2 lowers and missing 1 spring!

The Best LPK

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Fantastic LPK. Used this on a standard X15 Aero Precision lower. Great fitment on all pieces. By the time you add up a couple SI enhanced pieces you might as well just purchase the LPK. Highly recommended. I will probably purchase more just to have spare parts and use on future builds.

Missing safety detent

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Eh. Not a bad kit for the money. Everything fits nicely on a PSA lower. I'm not sold on the bolt release. It seems to stick out a little further than I like, but it is easy to manipulate. The safety selector is a little sharp, but it's nice to have the 60/90 degree option. Be sure to count your parts before you start building! Like others I was missing a part - the safety detent in my case. I like Strike Industries but they need to up their quality assurance on these kits. Of course Primary Arms is all kinds of awesome and took care of the issue immediately!

wont by another

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used it for a friends build as he needs an ambi safety selector. was so impressed with the quality i will be buying strike LPKs from now on.


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This is the 2nd SI LPK I have purchased, and will not be using it again.. mag release didn’t catch, (threw an old Anderson MFG mag release in just to see if it was me, worked perfectly).. bolt catch roll pin would not seat properly, ended up chunkin’ my lower despite an OCD tape job.. finally, the front take down pin would not drop all the way.. seemed like the machining just wasn’t there this time around.. will not take that chance again, gonna have to try a different company...

good complete kit, my goto from now on.

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Everything was there, nicely sorted into little bags, everything fit, bolt catch took a little fitting as usual, stoned the mating surfaces and took a little off the area below the plunger. Usual stuff. Ambi Safety not bad, 45 or 90 throw, easy to figure out. Whole kit went into a Anderson lower without a hitch. Ordering another one when back in stock.

Nice upgrade from standard LPK


I love this lower parts kit. It's exactly what I needed to add a nice custom touch to my current build. I especially like the ambidextrous safety selector with a short throw. Everything fit perfectly without a problem. I would recommend this to anyone.

A nightmare for newbies

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This kit may be fine for seasoned builders, but unless you can identify each piece on your own...good luck. I assumed (wrongly) that parts would be packaged in groups for the build stage (like Spike's does). The parts come in three bags with all springs in one and an apparently random mixture in the other two. While many pieces are obvious can you tell the difference between a trigger guard roll pin and the bolt catch roll pin? I tried their website and no help there. Went to others and used images to assist but from pictures it looks like they sent two selector springs and one detent spring...but I cannot be sure since I'm a newbie.
<br>Other reviews mention missing this or that, which knowledgeable folks can see right away. I would wind up assuming the wrong piece. I know it sounds like I'm just whining on my first build, but it seems like this kit is best left for the Pros.

Perfect LPK

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I saw other reviews about packaging making it hard to differentiate what parts go where. This was not an issue and shouldn’t be, if you are building an AR you should already be very familiar with the parts and/or following a guide. These parts worked great for me and feel like good quality, threads are smooth and everything fits right. Love the way it all looks after being on the gun, ambidextrous safety looks good too. Will be buying more for future AR builds.

Strike Industries has a winner on their hands

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This Strikes Industries lower build kit is the same price a MILSPEC but more esthetically pleasing and better in quality. This has become my go to build kit. Highly recommend.

You’d Be Better Off With A Bargain Brand Cheapo LPK


Far less than impressed with the quality, or lack there of, for this Strike Industries LPK. The roll pin for the bolt catch opened up and bent when I was installing it with the approximate punch. The buffer retainer was a larger diameter than the hole in my mil-spec receiver. Finally the detents and milling on the SI 60-90 degree safety selector was terrible, so much that it only worked in the 90 degree orientation. Definitely not Strike Industries best work.

The Best LPK for the Money

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This is by far the best deal on a quality LPK minus trigger and grip that isnt "ordinary" or "milspec" Everything about this kit speaks quality, the springs are quality springs that dont take a set, have had these for years in many rifles and have never had anything break out of these lpks. Very ergonomic with the ability to choose ambi safety and the bolt catch is by far my favorite out on the market out of all bolt catches out there. its mag release works well with all brand of mags and the magazine release button is well textured for positive grip on the index finger. The detents seem like qualiy and hardened I have not shaved off any tips from detents from these kits running the guns hard and many tactical classes. These work and look great on both forged and billet lowers. And I have had zero issue with these kits with many types of receivers.

Nice, slightly custom kit for the money

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This is a fine kit. I use this for builds when the customer wants something a little "nicer" or more custom than MilSpec, but doesn't want to pay for some of the higher-end stuff. Everything here fits perfectly, functions perfectly, and looks nice. I've installed this kit in probably 40 builds, and I've never had an issue when installing, and I've never had a customer complain. No, they didn't label every part for you like a puzzle for a toddler. If you don't know how to build an AR or aren't willing to put in the time to do a little research, do yourself a favor and go buy a'll treat you well and you won't have to figure out why the roll pin that's two sizes too big for the hole you're trying to jam it into won't fit.

No complaints here .

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Great kit if you already have a trigger . It comes with a short throw ambi safety some companies charge more for an ambi selector for more than this whole kit. The bolt catch is nice and big with nice texture and the mag release sticks out a little more to make it easier to find . The take down and pivot pins are just a tiny bit too long to make it easier to push out with your finger and a little grove to get your finger nail In to pull the out. And I like how the detents kinda fit into the springs makes it easy to assemble