The FRP phenomenon cannot always be shown by viewing only the peak sound pressure. PEW Science Note 2: First-round sound signatures always differ from subsequent shots, as the atmosphere within the silencer changes. This is a reflection, in impulse space, of the low amplitude of the early-time endcap exit event pressure. PEW Science Note 1: There is a very smooth, relatively featureless rise in impulse at a time of 29.6 ms with the RT30Ti that is not observed in the signatures of the VOX S, Half Nelson, or Resonator K. The Q Half Nelson has more FRP impulse at the muzzle than the RT30Ti. However, it is interesting to note that although the FRP is noticeable, the overall magnitude of the FRP impulse with the RT30Ti is similar to the impulse of all shots with the Energetic Armament VOX-S that is, the VOX-S exhibits a sound signature at the muzzle that is always louder than that of the RT30Ti. The first round pop is postulated to be noticeable to bystanders, as determined by PEW Science inner-ear response analysis. Figure 3 shows a more exaggerated FRP in impulse space. Again, full and short timescales are shown.įigure 2 shows a slight pressure regime first-round-pop (FRP). The real sound impulse (momentum transfer potential) histories from the same 5-shot test are shown in Figure 3. A zoomed-in timescale displays the region of peak sound pressure in Figure 2b, for the first two shots. The primary sound signature pressure histories for all 5 shots are shown in Figure 2a. Overall subsonic 300 BLK performance comparisons of the two silencers are shown in Section 6.35.2 of this review. One notable difference between the early-time signature of the RT30Ti and those two silencers with subsonic 300 BLK is the significantly lower amplitude of the end-cap exit event with the RT30Ti. For comparison, the reader is encouraged to examine the subsonic 300 BLK test first round signatures of the Q Half Nelson in Sound Signature Review 6.29 and the Energetic Armament VOX S in Sound Signature Review 6.25. This is postulated to occur as a result of the length and baffle quantity of the RT30Ti. One distinguishing feature of the signature shown in Figure 1 is the delayed rise to a significant peak amplitude during the end-cap exit event. The RT30Ti can be obtained from Richmond Tactical. The silencer and brake weigh 12.8 and 1.5 ounces, respectively, for a total system weight of 14.3 ounces, as tested. The silencer is tubeless and constructed of 6AL-4V titanium and the muzzle brake is constructed of 17-4 heat treated stainless steel. The silencer has a removable end-cap that may be fitted with a wipe, if desired. The silencer is also available with a rear modular threading option in 1.375″ x 24 tpi for use with third-party mount options. The silencer mounts to a proprietary two-port muzzle brake mount the attachment of the silencer to the mount is facilitated by coarse threads behind a forward seating taper. It has a 1.61-inch diameter and is 8.375 inches in length. It is a 30 caliber centerfire rifle silencer, intended to suppress most cartridges with projectiles appropriately sized to travel through the bore, including 300 Winchester Magnum. The RT30Ti is designed and manufactured by Richmond Tactical. Richmond Tactical RT30Ti on a Q mini FIX 300 BLK with 8-in Barrel
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