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MPAR556 Gen II features upgrades to bolt hold open, handguard, adjustable gas block and barrels.

MasterPiece Arms MPAR556 Gen II

MasterPiece Arms MPAR556 Gen II

MasterPiece Arms Rifle Div.

MasterPiece Arms Rifle Div.

COMER, GA ( MasterPiece Arms,manufacturers of the MPA MAC Line of semi-auto pistols, carbines, suppressors and MPAR Rifles, is pleased to announce that the new MPAR 556 Sporting Rifle Gen II is now available and shipping.

The Gen II version of the feature heavy, stamped steel design includes updates and upgrades to the bolt hold open, handguard, adjustable gas block and barrels.

Bolt Hold Open: This new drop-in feature stops the bolt from closing after the last round of the magazine has been fired. There is also no button required to release the bolt stop when a fresh magazine with ammunition has been inserted into the lower.

Simply pull back on the charging handle to release pressure from the bolt against the stop and then release the handle to allow the bolt to strip the next round from the magazine.

This feature can be installed for all MPAR weapons that did not include this feature when manufactured.

MPAR556CDT - Receiver

MPAR556CDT – Receiver

New Handguard: MPA has completed a design on a new aluminum extruded handguard for the MPAR556 Gen II Sporting Rifle. This one piece extrusion is lighter and stronger than the previous clam shell design and allows better ventilation and cooling for rapid fire.

MPAR556CDT handguard

MPAR556CDT handguard

Adjustable Gas Block: MPA’s new adjustable gas block has a stem adjustment rod to provide four different settings of gas flow through the piston system. The adjustment stem is located through the front handguard cap for easy access by the shooter.

Black Nitride Barrels: The MPAR barrels have been upgraded to black nitride, which provides a hard, durable and corrosion resistant surface to the OD and ID of the barrel. Nitriding impregnates the material and is not a coating. No loss of accuracy as compared to hard chrome lining.

MPAR556CDT buttstock

MPAR556CDT buttstock

The MPAR 556 Gen II Sporting Rifle still contains the original features fans loved, including a short stroke piston design, user located side rails, a side folder 6 – position polymer buttstock, locked bolt action, full length top rail, angled foregrip and a non-reciprocating, side charging handle with forward-assist.

The MPAR 556 Gen II Sporting Rifle is compatible with AR15 / M16 magazines and is available in 5.56×45 (.223) caliber. The sporting rifle has a 16” black nitride barrel with a 1:9 twist and weighs 7.8 lbs. unloaded.

Disassembly remains user friendly. This American Made gun is available in multiple colors and offers the MasterPiece Arms Lifetime Guarantee. MSRP is $1,089.00.

For more information on MasterPiece Arms and their product line of pistols, rifles, carbine and suppressors, visit


About MasterPiece Arms:

MasterPiece Arms,main offices located in Carrollton GA and manufacturing in Comer, GA, combines quality engineering and state-of-the-art manufacturing to design and produce firearms, such as the re-innovated MAC Defender Series. MasterPiece Arms uses high accuracy CNC machining, turning, laser cutting and bending in its manufacturing process controlled by their ISO9002/TS16949 Registered Quality System.

MPA engineers test and re-test our weapons to provide customers with one of the most enjoyable guns available. With versatile uses such as personal and homeprotection, hunting, and tactical interests, MPA products are one of a kind and backed by a lifetime warranty for original owners. Learn more MasterPiece Arms products at, or call 866.803.0000.

MasterPiece Arms is now on Facebook at

  • 3 User comments to “MasterPiece Arms Unveils the Second Generation of the MPAR 556 Sporting Rifle”

    1. Jake Phillips on May 21, 2014 at 6:54 PM said:

      New gen 2 fixed all the problems that were turning me off of the gen 1. Cant wait to buy a gen 2

    2. I had a first generation MPAR that did not have many of these features. I sent the gun to MPA and they updated the rifle for me hassle free. It is good to see a company stand by what they say and honor warranties without and flak.

    3. Frank Benjamins on September 5, 2014 at 4:09 PM said:

      It is good to hear that MPA will bring the first generation of their MPAR’s up to date with their new ones. I’ve got an MPAR that I sent to them and got it back a week later, hassle free, with these new tidbits.

      Love this gun, very accurate and very reliable and now it’s got a couple of new features.

      A very welcomed alternative to the sea of Ar-15’s that I have been drowning in for the past two decades.

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