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Knight's Armament SR-15E3 Light Precision Rifle 18" Barrel (Collapsible stock) Complete 300 AAC BLACKOUT Upper Receiver Assembly 16" Stag Arms- MODEL 1 Stag AR-15 W/Detachable Carry Handle
Daniel Defense M4A1 (Mil Spec+) Rifle Stag Arms Complete AR-15 Tactical Lower Assembly Stag Arms- MODEL 2 Right-Handed Stag 15 With MI ERS Rear Flip Sight
Daniel Defense M4 Carbine, V5, Lightweight Barrel, No Sights Stag Arms Stripped AR-15 Lower Receiver, 5.56mm Marked MAGPUL PMAG® 40 AR/M4 GEN M3, 5.56x45 Magazine - AR15/M16, 40 ROUND CAPACITY, BLACK
Daniel Defense M4 Carbine, V7 LW, No Sights, Lightweight Barrel Daniel Defense M4 Carbine, V2 Daniel Defense M4 URG, 300 Blackout SBR With 10.3 in. Barrel
Daniel Defense M4 URG, 300 Blackout SBR With 10.3 in. Barrel
List Price: $1,149.00
Our Price: $1,069.00

Why Choose ?

Our website shows real time inventory, never wonder if an item is actually available.

Most orders ship within 1 business day (excluding weekends and USPS holidays) and arrive 1-3 business days later so we can get parts in your hands faster than most dealers can even process your order.

As a well established dealer on we have plenty of customer feedback.  Click here to check it out.

We do not export!

Huge Selection of AR15, M16 & M4 Parts and Accessories

Welcome to Operation Parts. Here you will find only the highest quality tactical gear and gun accessories for rifles, carbines, and submachine guns. We carry rifle handguards, rifle scope mounts and rings and much more from trusted manufacturers such as Advanced Armament (AAC), Aimpoint, A.R.M.S., Blue Force Gear, Black Dog Machine, Brownell's, Buffer Technologies, Ciener, Daniel Defense, Eagle Industries, EOTech, Ergo, Falcon Industries, Gear Sector, Geissele, GG&G, Grip Pod, Harris Engineering, H&K, Insight Technologies, Knight's Armament (KAC), Lewis Machine & Tool (LMT), Magpul, PRI-Precision Reflex, Redi-Mag (Boonie Packer), Rock River Arms, Samson, Specter Gear, Streamlight, SureFire, TangoDown, Target Master, Trijicon, Troy Industries, Viking Tactics, Vltor, Yankee Hill Machine (YHM) and many more.

View customer feedback from forums HERE

Be sure to contact us for any products that you don't see, we have a huge selection of AR15 parts and M16 / M4 parts including AR15 stocks and many other products available. Our goal is to stock the quality parts that you need to customize your AR-15, M4, M16, or MP5 while offering them at a very competitive price.

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Today's Super Deal!

GG&G Medium Long Sleeve Shirt, Tan

List Price: $17.00
Our Price: $13.60
Sale Price: $7.99

Top Sellers

Stag Arms AR-15 Lower Receiver Parts Kit
Our Price: $69.00
Daniel Defense AR-15 Lower Receiver Parts Kit
Our Price: $92.00
Daniel Defense AR-15 Carbine Omega Rail 7.0 Inch
Our Price: $250.00

New Products

Helium Whisper Ten Speed™ Double M4 Magazine Pouch, Coyote Brown
Vickers Combat Applications Sling™, Two-Point Quick Adjust, Original Style, Molded Acetal Adjuster And Hardware, Black
Vickers Combat Applications Sling™, Two-Point Quick Adjust Padded Carbine Sling, Molded Acetal Adjuster And Hardware, Black
Helium Whisper Ten Speed™ Single M4 Magazine Pouch, Coyote Brown
SOC-C™ Modular Padded Belt Kit With Inner Belt And Suspenders, Coyote Brown

Operation Parts
PO Box 52
Linden, MI 48451 USA
P: (810) 513-5093
F: (866) 796-5182

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