Strike Industries Enhanced AR15 Lower Parts Kit with Trigger, Hammer and Disconnector

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TherPStrike Industries Enhanced AR15 Lower Parts Kit with Trigger, Hammer and Disconnector parts kit offers a convenient upgrade package for the AR15 for those looking for a complete Strike Industries solution for new builds, or to update their plain jane AR.rP This kit includes all the basics that you will need to build out your AR (minus grip), but with Strike Industries Enhanced lower parts where applicable.

This complete kit includes our fire control group which offers a crisp 4.5-5.5 lb pull, with unmatched smoothness for mil-spec style AR15 triggers.rP Longitudinally ground and polished sear engagement surfaces coupled with precision cut sear angle equate a vastly improved trigger feel without sacrificing safety or reliability.

Package includes:


Enhanced Bolt CatchrP features improved grip surfaces and angles
Enhanced Magazine Catch
Enhanced Magazine Catch Button features improved grip surface
Enhanced Pivot Pin longer of the two large pins.
Enhanced Takedown Pin smaller of the two large pins.
SI Selector Lever 2 included in package
SI Selector End Plate
SI 60-90r` 3-in-1 Selector Shaft with screws

Bolt Catch Spring easily confused with the disconnector spring; disconnector spring is tapered though.
Buffer Retainer Spring second largest coil type spring in the kit.
Disconnector Spring ’0C slightly larger than bolt-catch spring, identifiable because one end is a little bit wide than the other.
Hammer Spring largest of all the springs.
Magazine Catch Spring this is the largest coil spring in the kit.
Pivot Detent Spring same as the takedown detent spring, so there are two in a kit.
Selector Spring similar to the takedown and pivot detent springs, but larger diameter; there will only be one of these.
Takedown Detent Spring same as the pivot detent spring, so there are two in a kit.
Trigger Spring the smaller of the two largest springs.

Bolt Catch Plunger ’0C mushroom shaped pin
Bolt Catch Roll Pin smaller of the two roll pins.
Hammer Pin ’0C solid pin with machined grooves; can be inserted from either side.
Pivot Detent same as takedown detent; both sides usually rounded or semi-conical.
Selector Detent one end is flat, the other pointed/semi-conical.
Takedown Detent same as pivot detent; both sides usually rounded.
Trigger Pin same as hammer pin; can be inserted from either side.
Buffer RetainerrP ’0C large hollow barrel with small pin protruding from the top

Trigger: ’0C Investment cast trigger, CNC machined, heat treated, phosphated, precision ground
Hammer: ’0C Investment cast hammer, CNC machined, heat treated, phosphated, precision ground

Includes SI's signature Enhanced Lower Parts (AR-EBC, AR-EMC, AR-EPTP, & AR-HS-60/90-3in1)
SI's Trigger Springs provide a consistent 4 rm to 5 rm lbs trigger pull with our fire control group

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Returns Policy

You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.


We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.

How To Buy A Gun
We can only ship guns to licenced firearm owner's living in New Zealand.

If you do not have a licence then consider applying. The process is outlined here on the NZ Police website.

All firearms and serialised receivers require a mail order form to be completed. Download the mail order form here , print it, and take it to your local police station. The police officer receiving it will then validate your licence, sign / stamp it and email a scanned copy of the form to us. Once we receive the mail order from the police we will disptach the firearm or receiver.

We do not stock E Category firearms but can act as your agent for import. However we recommend using the POL67X method instead as being quicker and more reliable than applying to police for an import permit. You can download a POL67X form here.

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