SIONICS 10.8″ Handguard


The SIONICS free float M-LOK Handguard is a lightweight, durable, and versatile handguard for AR-15s. It features M-LOK slots and a slim profile.

2 in stock

SKU: S-R-108-MLOK Categories: , Product ID: 13731


The SIONICS 10.8″ handguard is a great choice for building or upgrading your AR-15. It’s made from lightweight and durable 6061-T6 aluminum, and it features M-LOK slots at the 3, 6, and 9 o’clock positions for attaching accessories. It also has 2 M-LOK slots at the 1 and 9 o’clock forward positions, which are great for mounting offset weapon lights. Additionally, there are 4 quick detach sling swivel slots, 2 at the rear and 2 at the front. Each handguard includes the barrel nut, mounting hardware, and a 5 slot picatinny rail piece.

Actual Length: 10.8125in / 275mm
Installed Weight: 9.6oz / 272g

Internal Diameter:  1.36″

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.


SIONICS_V3_10.8_13.5_14_15_Handguard Manual


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SIONICS handguards are incredibly rigid and the inherent design features ensure anti-rotation. Through rigorous testing both by SIONICS and the many LE agencies using SIONICS rifles we can ensure zero retention when using IR/VIS aiming devices.

SIONICS handguards feature QD attachment points at the forward and rear 3 and 9 o’clock positions. SIONICS QD receiver sockets are anti-rotational.