5.56x45mm
MAC

5.56x45mm MAC Guns for Sale

Yankee Hill Machine AR-15 Stripped Lower Receiver

YHM AR-15 Billet Stripped Lower Receiver

5.56x45mm MAC Guns Price Graph

  • Today's 5.56x45mm MAC Guns average of $1,324.94 is more expensive than 100% of daily averages in the last 180 days.
  • Today's low of $167.99 is cheaper than 90% of daily lows in the last 180 days.
  • The average peaked at $1,324.94 on October 23, 2026 and bottomed at $454.75 on August 15, 2026.

YANKEE HILL MACHINE COMPANY FAT CAT 5.56 SRX MNT CAT CAP

YANKEE HILL MACHINE COMPANY FAT CAT 5.56 SRX MNT SLNCR

TACTICAL MACHINING TM-15 - RIFLE: TACTICAL MACHINING MODEL TM-15, SERIAL NUMBER B0003361, FLAT DARK EARTH, CASE NOT INCLUDED, SEMI - AUTOMATIC, 5.56 NATO, 16 Notes: The Tactical Machining TM-15 is a semi-automatic rifle featuring a 16-inch barrel and a desert tan finish w...

Used
Shipping $26

YHM Turbo K-RB Integral 5.56 11.5" Suppressed Upper

YANKEE HILL MACHINE CO. Black Diamond AR-15 Rifle - This rifle is in very good shape, as you can see there is some wear and tear on the stock and grip, but it is very minimal. The action is sharp, crisp, and ejects shells as it is supposed to. The bluing does show some mil...

Used
Shipping $48.04

YANKEE HILL MACHINE COMPANY TURBO INTEGRAL 5.56 UPPER 10"

$1,239.00
Free Shipping

YANKEE HILL MACHINE CO. YHM-15 - Type: Used Make: Yankee Hill Machine Model: YHM-15 Serial Number: KC0011 Caliber: 5.56 Capacity: 30rd Action: Semi-Automatic Barrel Length: 16.5" Sights: Folding Finish: Black Bore Condition: Bright & Sharp Overall Condition: Minimal signs ...

Used
Shipping $68

LEWIS MACHINE AND TOOL defender 2000 - USED FIREARM LISTING Manufacturer: Lewis Machine & Tool Model: Defender 2000 Caliber / Gauge: 5.56 Action Type: Semi Automatic Capacity: 30 Rounds Barrel Length: 16" Finish / Color: Polymer CONDITION Condition Rating: Excellent Mecha...

Used
Shipping $72

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LEWIS MACHINE AND TOOL defender 2000 - USED FIREARM LISTING Manufacturer: Lewis Machine & Tool Company Model: Defender 2000 Caliber / Gauge: 5.56 Action Type: Semi Automatic Capacity: 30 Rounds Barrel Length: 16" Finish / Color: Polymer CONDITION Condition Rating: Excelle...

Used
Shipping $75

LEWIS MACHINE AND TOOL Defender 2000 - Lewis Machine &Tool Defender 2000 AR-15 5.56 rifle in great condition. Comes with Holosun 403C Elite optic, fire field light, laser combo, and vertical grip. Comes with 1 magpul 30 round mag. Will ship in soft case.

Used
Shipping $75

LMT Defense MARS-LS MRP Semi-Auto Rifle MRPMLK16-MARS, 5.56 NATO, 16", B5 SOPMOD Stock, MRP Upper, Ambidextrous, 30+1

LMT Defense MARS-LS Specwar Semi-Auto SBR MIDMLK125-MARS, 5.56 NATO, 12.5", B5 SOPMOD Stock, MRP Upper, Ambidextrous, 30+1

LMT Defense MARS-LS Semi-Auto Rifle MRP16-MARS, 5.56 NATO, 16", B5 SOPMOD Stock, MRP Upper, Ambidextrous, 30+1

LMT Defense MARS-LS Semi-Auto Rifle MLSN16PS-MARS, 5.56 NATO, 16", b5 SOPMOD Stock, Shovelnose Upper, 30+1

LMT Defense MARS-LS R20 Rahe Semi-Auto Rifle CQBMLK143PW-MARS-ES, 5.56 NATO, 14.3 Pinned", MARS-L Ambi Lower, CQB Upper, 30+1

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