Spikes Tactical Upper - ST Compressor (5.56) 8.1" w/LRS-1

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The Spike’s Tactical Compressor Complete Upper is the long awaited culmination of SBR and suppressor technology. Developed in conjunction with active law enforcement, the ST Compressor Upper has been brutally overbuilt without losing the finer points that make it Sub MOA accurate at extended ranges. The ST Compressor Upper is the first factory produced SBR Upper with an integrated sound suppressor that requires no maintenance. By employing billet technology, its designers were able to cleanly design-in every feature that was previously applied as an external add on. With the use of self lubricating coatings, and heat-sync technology, the ST Compressor Upper represents the digital upgrading of the analog rifle.


NOTE: The ST Compressor Upper is a Class 3 SBR Upper with a Class 3 Sound Suppresor. This product will require filing a Form 4 to take delivery from your FFL. Cost of tax stamps not included in price.



  • ST Billet Upper Receiver
  • Integrated Barrel Nut Upper
  • ST 9″ BAR Rail w/ Heatshield
  • ST LRS-1 Suppressor
  • ST Compressor 8.1″ FN CHF Radial Fluted Barrel
  • ST Pinned Gas Block w/ Integrated Collar
  • ST DynaComp Muzzle Device w/ Integrated Mount
  • ST Melonite Gas Tube
  • ST Nickle Boron Bolt Carrier Group
  • weight of 5.15lbs (Complete with LRS-1 and BCG)



  • (1) ST Compressor Upper
  • (1) ST LRS-1 Suppressor
  • (3) Low Profile Ladder Rail Covers
  • (1) Spike’s Tactical Lifetime Warranty

Additional Information Content

Modern Warriors

We started Modern Warriors for the sole purpose of providing a less expensive way to enjoy our love of buying and shooting some really cool stuff. What started as a hobby has turned into a business where we have developed the experience and ability to help you enjoy our same hobby and save you money in the process.

We specialize in tactical weapons, including suppressors, short barrel rifles and full auto weapons. We have routine experience in shooting the weapons we carry, so if you want our opinion on how a weapon operates, we will gladly provide it. We also have expertise working with licensed professionals in setting up gun trusts, which is an ideal way of purchasing, owning and operating any weapon restricted by the National Firearm Act. Don’t let the word “trust” scare you. It is very easy to set one up if you have the right help.

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