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Stag Arms- MODEL 2 Right-Handed Stag 15 With MI ERS Rear Flip Sight MAGPUL EMAG 30 MagLevel, 5.56x45 Magazine - AR15/M16, 30 ROUND CAPACITY, BLACK Daniel Defense M4 URG, V3 Mid-Length With DDM4 9.0 Rail
Daniel Defense M4 URG, V3 Mid-Length With DDM4 9.0 Rail
List Price: $1,199.00
Our Price: $1,139.00
GEN FOUR SI DEFENSE Billet 5.56 / .223 AR-15 Lower Receiver Daniel Defense M4 16" URG, V4 With Omega X 9.0 Rail Complete 300 AAC BLACKOUT Upper Receiver Assembly 16"
Daniel Defense M4 16" URG, V4 With Omega X 9.0 Rail
List Price: $1,079.00
Our Price: $1,003.00
MAGPUL PMAG® 40 AR/M4 GEN M3, 5.56x45 Magazine - AR15/M16, 40 ROUND CAPACITY, BLACK Daniel Defense M4 Carbine, V7, No Sights LMT-LEWIS MACHINE & TOOL CQB DEFENDER PISTON, 16 INCH CHROME LINED BARREL, STANDARD BOLT CARRIER GROUP, TRIGGER, SOPMOD STOCK
LMT - LEWIS MACHINE & TOOL CQB DEFENDER WITH 16 INCH CHROME LINED 1:7 TWIST BARREL, STANDARD TRIGGER, STANDARD BOLT AND SOPMOD STOCK Daniel Defense M4 Carbine, V5, No Sights, 300 AAC Blackout Daniel Defense M4 URG, MK18 With 10.3 in. Barrel, Dark Earth RIS II
Daniel Defense M4 URG, MK18 With 10.3 in. Barrel, Dark Earth RIS II
List Price: $1,149.00
Our Price: $1,119.95

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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 AR15.com 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 AR15.com 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!

Daniel Defense M4 16" URG, V5 LW With Omega X 12.0

List Price: $1,079.00
Our Price: $1,003.00
Sale Price: $899.95
Daniel Defense M4 16" URG, V5 Lightweight With Omega X 12.0 Rail
The Daniel Defense M4 URG, V5 LW is perfectly adapted for end-users who plan on attaching the ever popular red dot, holographic or magnified optics to their firearm.


Top Sellers

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


New Products

Vickers Combat Applications Sling™, Two-Point Quick Adjust, Original Style, 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
Vickers Combat Applications Sling™, Two-Point Quick Adjust Padded Carbine Sling, Molded Acetal Adjuster And Hardware, Black
Helium Whisper Ten Speed™ Double M4 Magazine Pouch, Coyote Brown


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

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