PRS-15 Echo – E556 & E300 Rifle

Feature Overview

The PRS-15 Echo Series is designed for use in law enforcement, military operations, or the sporting field, as well as, competitive shooting. The PRS-15 is a true AR platform tactical rifle. Provides unparalleled accuracy, with a Nitride treated barrel that provides maximum durability and corrosion resistance. A 7075-T6 aircraft grade aluminum forged lower receiver adds to the durability and reliability.

  • Direct impingement gas operating system with rotating locking bolt
  • 100% MADE IN THE USA
  • Echo Series Advanced Match Quality Barrels – Accuracy of 1-MOA or less
  • 4150 Chrome Moly Vanadium Steel
  • Black Nitride QPQ Corrosion Resistant Finish, Coated M4 Feed Ramp Extension, Coated Low Profile Gas Block, Coated Gas Tubes
  • Available in 5.56mm NATO and 300 Blackout Calibers
  • Light weight Free Float Enhanced Keymod Hanguards, available in 12.5″ and 15″ lengths
  • The KeyMod system allows advanced modularity past the current 1913 picatinny rail system. Engineered to mil-spec dimensions,eliminating bulk while retaining strength and stability.
  • Short Barreled NFA Rifle and Pistol options available
  • Our 300 Blackout version is available with matched suppressor options for a quieter experience
  • * Items in this series are coated in Black Nitride through the process knows as QPQ (also known in the industry as Ferritic Nitrocarburizing, Melonite, SBN “salt bath nitriding”)


ModelE556 & E300 Rifle
Calibers5.56mm NATO and 300 Blackout
Barrel Length16 in (406 mm)
Barrel ProfileMatch HBAR
Action Typesemi-auto
Trigger TypeMil-Spec
Collapsed len32 in (813 mm)
Stock TypeTelescopic 6-position collapsible M4 Stock
Trigger wt5.5-9.0 lb (24-40 N)
Twist Rate1 in 7
Forend Type12" & 15" MLOK Rifle Specialist Gen2 Handguards
Grip TypeErgo Sure-Grip
Receiver & FinishForged 7075 Aluminum, Type III Hard Anodized
Expanded length35.25 in (895 mm)
Overall Width2.6 in (66 mm)
Height7.5 in (191 mm)
Threads1/2 in - 28 tpi (5.56) 5/8 in - 24 tpi (300)
AccessoriesSingle point sling mount, magpul aluminum trigger guard
Operating SystemDirect Gas Impingement
Weight w/o Mag6.5 lb (2.9 kg)
Mags Included1 - 30rd Aluminum Mil-Spec Magazine

Feature Highlights

Spec Sheet PDF

SKUModelCaliberBarrel LenBarrel ProfileHandguardGrip TypeCollapsed LengthExpanded LengthThreadsWeight w/o MagSightsMSRP
PRS15-E556-16-T125E556 Rifle5.56mm NATO16 inMatch HBAR12.5" TRS KeymodErgo SureGrip32 in35.25 in1/2 in - 28 tpi6.5 lboptional$1,559
PRS15-E556-16-T15E556 Rifle5.56mm NATO16 inMatch HBAR15" TRS KeymodErgo SureGrip32 in35.25 in1/2 in - 28 tpi6.5 lboptional$1,649
PRS15-E300-16-T125E300 Rifle300 Blackout16 inMatch HBAR12.5" TRS KeymodErgo SureGrip32 in35.25 in5/8 in - 24 tpi6.5 lboptional$1,559
PRS15-E300-16-T15E300 Rifle300 Blackout16 inMatch HBAR15" TRS KeymodErgo SureGrip32 in35.25 in5/8 in - 24 tpi6.5 lboptional$1,649

Other variations available

Echo EQR

Echo SBR

Echo Pistol