SIONICS Enhanced Lower Parts Kit

(1 customer review)

from: $8995

This parts kit includes our Enhanced Mil-Spec Trigger and high-quality springs, pins, and components. The Enhanced Mil-Spec Trigger is a smooth, reliable trigger with a 6.5 pound pull weight. The springs, pins, and components are made from the highest quality materials and are designed to last.

Due to Market Conditions, the Estimated Ship Date is July 31, 2024 - August 5, 2024
SKU: S-EPK Category: Product ID: 15229


The SIONICS Enhanced Mil-Spec Trigger is a high-quality trigger that offers a smooth, “grit-free” pull and break. It is built with proven Mil-Spec components and a durable, corrosion-resistant Nickel PTFE coating. The trigger pull weight averages 6.5 pounds.

The Enhanced Kit contains the following:

1- SIONICS Enhanced Mil-Spec Trigger
1- Semi Auto Disconnect
1- SIONICS Enhanced Hammer
2- Hammer / Trigger Pin
1- Trigger Spring
1- Hammer Spring
1- Disconnector Spring
1- SIONICS Ambidextrous Selector – Long on left side and Short on right side.
1- Safety Detent
1- Safety Detent Spring
1- Standard Bolt Catch
1- Bolt Catch Plunger
1- Bolt Catch Roll Pin
1- Bolt Catch Spring
2- Takedown / Pivot Spring
2- Takedown / Pivot Detent
1- Takedown Pin
1- Pivot Pin
1- Magazine Catch
1- Magazine Release Button
1- Magazine Catch Spring
1- Buffer Retainer Pin
1- Buffer Retainer Spring

Optional Upgrade Selection:

Selector: Radian Talon Ambidextrous Selector

SIONICS Warranty

The SIONICS Warranty

All SIONICS Weapon Systems Firearms, Receivers and Parts are manufactured for a Lifetime of Hard Use. The definition of a Warranty is a Guarantee from a manufacturer that a defective product will be repaired or replaced.

SIONICS Parts Warranty (Barrels, BCGs, LPKs etc.)

All SIONICS Weapon Systems Parts carry our Guarantee against defects in original materials and workmanship. If any SIONICS product shows evidence of such defects, we will fix, repair, or replace your product with that of an equal value product. SIONICS Weapon Systems does not warranty products or damage caused to our products by the correct or incorrect installation of other manufacturer’s products. 


Step 1:

Call 520.396.3460 (Monday – Thursday 7:00 – 17:00 MST) and speak with one of our Excellent SIONICS staff to begin the troubleshooting process of your product. If deemed necessary you will then obtain an RMA# (Return Merchandise Authorization) to initiate the warranty claim. Outside of business hours please email us at

Step 2:

Once established that your item should return to SIONICS for further inspection, you will need to ship your defective/non-working item.

Return the item to our facility:
Make sure your assigned RMA# is clearly displayed on the outside of all return packages. This is necessary to match each package to the correct warranty claim. In addition please include a document listing your RMA#, Name, Phone Number as well as email address.

ATTN: Warranty Department
SIONICS Weapon Systems
5118 E. Pima Steet
Tucson, Arizona 85712

Step 3:

Our team here at SIONICS will work quickly to process your claim. Once your item is received, we will inspect and test within one business day. If the item is deemed defective, we will communicate back to you on your claim with the appropriate plan for repair or replacement.

1 review for SIONICS Enhanced Lower Parts Kit

  1. Julian

    Best bolt ever period. Makes racking the thing feel like a velvet pancake.

    Even more impressive is their customer service, they’re real human beings. I live in an isolated town in southeast Alaska and the mail system is pretty weird. Within an hour of hitting the buy button, they called me up asking to make sure the address was right and we had a brief conversation about where I live.

    You won’t be disappointed.

Add a review

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With the exception of the SIONICS builders kit, the answer is yes. You choose between a SIONICS Enhanced Mil-Spec trigger system or the two-stage trigger. system.

The most important parts to pay attention to would be your hammer and trigger springs. Generally, if you have worn out your barrel, your trigger and hammer springs are ready to be replaced.

Good luck.









But seriously, if you lose something, give us a call.