Apollo Series 11.5" Suppressor Optimized AR-15 SBR

The Apollo Series represents our most refined platform — a no-compromise rifle built for serious shooters who demand the highest level of shootability, accuracy, and reliability under sustained, high-round-count use.

Every component was reevaluated with one goal: to create a rifle that delivers professional-grade performance shot after shot, whether you're running drills, competing, or pushing the limits of what an AR-15 can do.

Apollo is the same rifle trusted by SWAT and specialized units who can't afford equipment that fails — engineered to the same uncompromising standard, but available to shooters who understand what separates a truly refined system from a collection of high end parts.

Barrel:

Apollo barrels are machined from 4150 CrMoV ordnance-grade steel and finished with H&M Black Nitride treatment for maximum durability and corrosion resistance. Feed ramps are hand-polished to ensure flawless feeding across modern projectile profiles, and each barrel is dimensionally inspected before assembly. The result is accuracy potential rarely seen in rifles built for hard use — because precision and reliability aren't mutually exclusive.

The 11.5" Apollo barrel is chambered in 5.56x45mm NATO (.223 Wylde available as an upgrade option). The medium-weight profile features a continuous taper from chamber to gas block shoulder, balancing heat management with maneuverability while keeping material where you need it most for the rigors of heavy suppressed fire. 5/8"-24 threads with a square shoulder increase suppressor mounting rigidity and reduce the risk of baffle or end-cap strikes compared to standard 1/2"-28 threading.

BCG:

By reading the specifications alone — Diamond Like Coating on the bolt and carrier exterior, chrome-lined carrier body, Carpenter 158 HP/MPI bolt, Sprinco extractor and ejector springs, flattened and sealed gas key torqued with OCKS fasteners — you would be left with the impression that the Apollo series rifle has a premium bolt carrier group. But specs only tell half the story.

Unlike factory-assembled BCGs built from parts bins, every component of the Apollo series BCG is first measured, then sorted by dimension to carefully manage clearances between male and female parts such as the bolt and carrier body. This dimensional control is what produces the extreme gas efficiency, reliability, and rifle-to-rifle consistency Alpine Research is known for.

Only after this screening and sorting process are components assembled into an Alpine Research bolt carrier group. Gas keys are then surfaced flat, sealed, torqued, and mechanically staked to prevent leakage and loosening under sustained high-volume shooting. This is the level of process control that eliminates the rifle-to-rifle variation common in even premium factory builds. After assembly, every completed bolt carrier group is fire-test validated through live firing to verify proper cycling, extraction, ejection, and lock-back on empty magazine. Only after passing this final validation is a BCG placed into inventory or installed in an Alpine Research rifle.

Suppression:

Unlike the Mach Series, which is a dedicated suppressed rifle optimized exclusively for higher-backpressure conventional suppressors, the Apollo was designed to excel both suppressed and unsuppressed. This makes Apollo the ideal choice for shooters who want one rifle that performs at the highest level in any configuration.

Apollo is specifically optimized for modern high-flow suppressors like HUXWRX and Specter's Cat — designs that don't trap gas the way traditional cone baffle suppressors do. By allowing combustion gases to exit more freely while still delivering exceptional sound suppression, these modern cans significantly reduce backpressure, gas blowback, and the harsh recoil impulse that plagues most suppressed rifles.

Under suppression with a high-flow design, the Apollo's refined mid-length gas system, A5 buffer system, and added suppressor mass combine to produce a rifle that shoots flatter and returns quicker than comparable platforms — allowing you to drive the gun faster while staying accountable with your hits.

Handguard:

We selected the SOLGW M89 Drive Lock rail for its robust lockup, anti-rotation design, and extreme rigidity. For shooters running lasers, IR devices, or who are rough on their gear, the M89 delivers absolute confidence that your setup won't shift under hard use.

Trigger:

Apollo series rifles ship with our excellent 2-stage match trigger, available in 3.5 or 4.5 pound pull weight. The trigger has minimal creep, crisp break, and short reset.

Comfort:

Apollo features the Radian Raptor charging handle and Talon selector, allowing ambidextrous use.

Specifications:

Frequently Asked Questions:

What's the difference between Apollo and Mach?

Apollo vs. Mach Comparison:

Apollo is a refinement of the MACH series rifle designed specifically for use with high flow-rate suppressors, like the Huxwrx Flow 556K and the Specter's Cat Whitebread.  Apollo series rifles feature a more accurate barrel constructed from a premium hand-lapped blank.  The Apollo barrel is specially configured to run unsuppressed despite its short dwell time.  Apollo matches its special barrel configuration with a intermediate length recoil system and Vltor A5 buffer.The Mach is a dedicated suppressed rifle optimized exclusively for conventional baffle suppressors — it will not cycle without a suppressor attached. If you need dual-purpose capability, Apollo is the right choice. If you run a conventional suppressor 100% of the time, Mach is one of the best options in existence.

Will the Apollo work unsuppressed?

Yes. The Apollo is specifically designed to excel both unsuppressed and suppressed with high flow-rate cans. Unsuppressed, the mid-length gas system produces a smooth recoil impulse with minimal dot lift and quick return to target. The rifle performs exceptionally well in either configuration without requiring any tuning or adjustments.

What suppressors work best with the Apollo?

The Apollo is optimized for modern high-flow suppressors like HUXWRX and Specter's Cat — designs that don't trap gas the way traditional cone baffle suppressors do. These high-flow designs allow the Apollo's refined gas system, A5 buffer, and added suppressor mass to produce a rifle that shoots exceptionally flat and returns incredibly fast. Traditional high flow restriction suppressors (conventional baffle cans) are not recommended for the Apollo — the Mach Series is purpose-built for those suppressors.

What is fire-test validation?

Every Apollo BCG is live-fired after assembly to verify proper cycling, extraction, ejection, and lock-back. This is in addition to the 70,000 PSI high-pressure test and magnetic particle inspection each bolt undergoes before DLC coating. Our testing standard reflects what our customers are trusting these components to do.

Can I get this as a pistol instead of an SBR?

Yes. Contact us directly and we can configure the Apollo as a pistol build. Pricing and lead times may vary.

What's included with the rifle?

Each Apollo rifle ships with the complete rifle as configured, three PMAG Gen 3 30-round magazines, and documentation. Suppressors are available as add-on options but are not included in the base price.

What is the .223 Wylde chamber upgrade?

The .223 Wylde chamber is designed to safely fire both .223 Remington and 5.56 NATO ammunition while offering improved accuracy potential over standard 5.56 NATO chambers. It's an excellent choice for shooters prioritizing accuracy with match ammunition. The standard 5.56 NATO chamber is more than adequate for most shooters and is recommended for duty or high-volume use.

How long is the lead time?

Since these rifles are NFA items (SBRs), the rifle ships after your FFL paperwork is received and the ATF Form 3 is approved. Build time is typically 0-2 weeks, and Form 3 approvals usually come within a few days. Contact us for current lead time estimates.